Successful Test

Side Project:

I got the parts to build the OLED breakout PCB this week. I got them assembled and connected to my test STM32 Arduino device. Unfortunately, I didn’t get anything to show up on the display.  I did measure the 13.8 volts on the high voltage part of the circuit. (I wasn’t sure if the inductor I chose for this voltage could handle the current. I am still not sure)

The STM board got hot quickly when trying to drive the OLED. This leads me to believe that the OLED is drawing too much current.  I expect this display to work as well as the test display I have been using. It should draw about the same amount of current. My first guess is I have a solder bridge somewhere on the PCB.


I created a C project with multiple files and it worked without any problems. So I did a little  research and found that when I add C into a C++ project I need to tell the compiler which functions are written in C.  I found that I can wrap the #include in an extern “C”{} declaration.

Still Looking for a Fail:

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